EP4008525B1 - Feeding devices and 3d printing apparatuses - Google Patents
Feeding devices and 3d printing apparatuses Download PDFInfo
- Publication number
- EP4008525B1 EP4008525B1 EP21205652.7A EP21205652A EP4008525B1 EP 4008525 B1 EP4008525 B1 EP 4008525B1 EP 21205652 A EP21205652 A EP 21205652A EP 4008525 B1 EP4008525 B1 EP 4008525B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- resin
- connecting pipe
- vat
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007639 printing Methods 0.000 title description 19
- 239000011347 resin Substances 0.000 claims description 140
- 229920005989 resin Polymers 0.000 claims description 140
- 239000007788 liquid Substances 0.000 claims description 88
- 238000010146 3D printing Methods 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/255—Enclosures for the building material, e.g. powder containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
Definitions
- the present invention relates to the technical field of stereoscopic printing, and in particularly to feeding devices and 3D printing apparatuses.
- 3D printing apparatuses also known as three-dimensional printing apparatuses, are machines using rapid prototyping technology, and construct three-dimensional entities in a layer-by-layer printing manner by using a forming material on the basis of digital model files.
- the 3D printing apparatuses have been widely applied to the fields such as industrial designs, architectures and aerospaces.
- CN 208 930 724 U describes a light curing 3D printer discharging and returning device.
- An objective of an embodiment of the present invention is to provide a feeding device and a 3D printing apparatus, which solves the technical problems of a model printing failure and a low printing efficiency caused by manual feeding of an existing 3D printing apparatus.
- the present invention provides a feeding device as defined by the appended claims.
- the driving device inputs gas into the container through the conveying device, such that the resin liquid inside the container is conveyed into the resin vat through the conveying device, thus under conditions that a liquid level height of the resin liquid inside the resin vat is low and that the printing apparatus can be lack of the resin liquid, automatic feeding is achieved to avoid a model printing failure due to lack of the resin liquid, and thereby printing efficiency is improved without manually supplementing the resin liquid to reprint a model.
- an embodiment of the present invention provides a feeding device.
- the feeding device includes a resin vat 10, a driving device 20 and a conveying device 30, wherein the driving device 20 is connected to the resin vat 10, the driving device 20 is connected to a container 40 filled with a resin liquid through the conveying device 30, and the interior of the container 40 is further in communication with the resin vat 10 through the conveying device 30.
- the driving device 20 inputs gas into the container 40 through the conveying device 30, such that the resin liquid inside the container 40 is conveyed into the resin vat 10 through the conveying device 30.
- the above container 40 can be a resin bottle without a bottle cap
- the conveying device 30 is connected to the container 40
- the container 40 can be provided with a closed accommodating cavity
- the accommodating cavity can be in communication with the resin vat 10 through the conveying device 30.
- the accommodating cavity can be connected to the resin vat 10 through the conveying device 30.
- the container 40 can be provided with a closed accommodating cavity, the container 40 can also be in communication with the resin vat 10 through the conveying device 30.
- the feeding device provided in the embodiment of the present invention can be applied to a 3D printing apparatus, and the above resin vat 10 is of a vat body structure for containing the resin liquid in the 3D printing apparatus.
- the above driving device 20 detects a liquid level height of the resin liquid inside the resin vat 10, and if the height of the resin liquid inside the resin vat 10 is lower than the first preset height, it is indicated that the resin liquid inside the resin vat 10 is exhausted, and the resin liquid needs to be conveyed into the resin vat 10.
- the driving device 20 inputs the gas into the container 40 through the conveying device 30, thereby increasing the intensity of pressure in the container 40, and the resin liquid inside the container 40 is conveyed into the resin vat 10 through the conveying device 30.
- air can be provided as the mentioned gas above in order to reduce cost.
- other gas can also be provided as the gas, for example, in order to avoid oxidation, inert gas such as argon, etc. can be used.
- the feeding device includes the resin vat 10, the driving device 20 and the conveying device 30.
- the driving device 20 is connected to the resin vat 10
- the driving device 20 is connected to a container 40 filled with a resin liquid through the conveying device 30, and the interior of the container 40 is further in communication with/connected to the resin vat 10 through the conveying device 30.
- the resin liquid inside the container 40 is conveyed into the resin vat 10
- the resin liquid inside the resin vat 10 can also be further recycled, that is, the resin liquid inside the resin vat 10 is conveyed into the container 40, thereby avoiding wasting of the resin liquid.
- the driving device 20 extracts the gas from the container 40 through the conveying device 30, thus, the resin liquid flows back to the container 40, wherein the second preset height is greater than the first preset height.
- the driving device 20 extracts the gas from the container 40 through the conveying device 30 to reduce the intensity of pressure in the container 40, such that the resin liquid inside the resin vat 10 flows back to the container 40 through the conveying device 30, and it should be understood that, at this moment, the liquid level height of the resin liquid inside the container 40 needs to meet a certain condition that the container 40 needs to have a certain space to accommodate the flowing-back resin liquid.
- the resin liquid is recycled through extracting the gas from the container 40 via the driving device 20, thereby avoiding the wasting of the resin liquid in a printing process.
- the conveying device 30 includes a container cover 31, a first connecting pipe 32 and a second connecting pipe 33.
- the first connecting pipe 32 and the second connecting pipe 33 are arranged on the container cover 31; and the container cover 31 is connected to the container 40, the first connecting pipe 32 penetrates the container cover 31, a first end of the first connecting pipe 32 is connected to the driving device 20, a second end of the first connecting pipe 32 is arranged inside the container 40, the second connecting pipe 33 penetrates the container cover 31, a first end of the second connecting pipe 33 is located inside the resin vat 10, and a second end of the second connecting pipe 33 is arranged inside the container 40.
- the first connecting pipe 32 and the second connecting pipe 33 can be hoses made of rubber or other materials, and when the container 40 is a resin bottle, the above container cover 31 can be a resin bottle cover, and the container cover 31 is connected to the container 40, thus the container 40 can be provided with a closed accommodating cavity.
- the second end of the first connecting pipe 32 and the second end of the second connecting pipe 33 are both arranged inside the container 40.
- a distance between the second end of the first connecting pipe 32 and a bottom wall of the container 40 is greater than the liquid level height of the resin liquid contained in the container 40, and the second end of the second connecting pipe 33 is configured to contact with the bottom wall of the container 40.
- the distance between the second end of the first connecting pipe 32 and the bottom wall of the container 40 is less than the liquid level height of the resin liquid contained in the container 40, or the distance between the second end of the first connecting pipe and the bottom wall of the container is equal to the liquid level height of the resin liquid contained in the container 40, and the second end of the second connecting pipe 33 is configured to make contact with the bottom wall of the container 40.
- the first connecting pipe 32 and the second connecting pipe 33 both make contact with the resin liquid inside the container 40.
- the second end of the second connecting pipe 33 is configured to make contact with the bottom wall of the container 40, to guarantee that all the resin liquid contained in the container 40 can be conveyed into the resin vat 10 through the second connecting pipe 33.
- each container 40 is filled with one color of resin liquid
- the conveying device 30 can be adapted to the plurality of containers 40 in the printing process, and when the conveying device 30 is adapted to each container 40, the feeding device may achieve an automatic feeding function described in this embodiment to convey the resin liquid inside each container 40 to the resin vat 10 such that the resin liquids of a plurality of colors can be conveyed into the resin vat 10.
- the distance between the second end of the first connecting pipe 32 and the bottom wall of the container 40 is greater than the liquid level height of the resin liquid contained in the container 40, such that the first connecting pipe 32 does not make contact with the resin liquid contained in the container 40, and when the containers 40 filled with the resin liquids of different colors are adapted, only the second connecting pipe 33 needs to be cleaned such that mixing of the resin liquids of different colors can be avoided.
- Another possible condition is that when printing is completed and the feeding is stopped, the driving device 20 is controlled to extract the gas from the container 40, such that the resin liquid inside the resin vat 10 flows back to the container 40, or the resin liquid remaining inside the second connecting pipe 33 flows back to the container.
- a first through hole and a second through hole that penetrate the container cover 31 are respectively provided on the container cover 31, the first connecting pipe 32 penetrates the first through hole, and the second connecting pipe 33 penetrates the second through hole.
- the first through hole and the second through hole that penetrate the container cover 31 are respectively provided on the container cover 31, wherein the shapes of the first through hole and the second through hole are related to those of the first connecting pipe 32 and the second connecting pipe 33, and if the first connecting pipe 32 and the second connecting pipe 33 are circular pipes, the first through hole and the second through hole are circular holes.
- the first through hole and the second through hole are provided on the container cover 31, such that the first connecting pipe 32 and the second connecting pipe 33 penetrate the container cover 31.
- the second connecting pipe 33 includes a first connecting sub-pipe and a second connecting sub-pipe, wherein a first end of the first connecting sub-pipe is located inside the resin vat 10, the second connecting sub-pipe is located inside the container 40, and a second end of the first connecting sub-pipe penetrates the second through hole to be connected to a first end of the second connecting sub-pipe; and a distance between a second end of the second connecting sub-pipe and a bottom wall of the container 40 is less than a preset value.
- the distance between the second end of the second connecting sub-pipe and the bottom wall of the container 40 is less than the preset value, wherein the preset value is less than the liquid level height of the resin liquid contained in the container 40, to guarantee that the second connecting sub-pipe makes contact with the resin liquid inside the container 40, and the resin liquid inside the container 40 can be conveyed into the resin vat 10 through the second connecting pipe 33, thereby achieving feeding.
- One preferred implementation is that the second end of the second connecting sub-pipe makes contact with the bottom wall of the container 40, and under this condition, it can be guaranteed that all the resin liquid inside the container 40 can be conveyed into the resin vat through the conveying device 30.
- the driving device 20 includes a fixed seat 21, an elastic component 22 and a rotating component 23, wherein the fixed seat 21 is connected to the resin vat 10, a first end of the elastic component 22 is connected to the fixed seat 21, and a second end of the elastic component 22 is connected to the rotating component 23.
- FIG. 2 is a structural diagram of the driving device in an embodiment of the present invention.
- the driving device 20 includes the fixed seat 21, the elastic component 22 and the rotating component 23, wherein the above elastic component 22 can be a spring.
- the driving device 20 is movably connected to the resin vat 10, and after printing is completed, the rotating component 23 can be controlled to rotatably lift through an extension spring, such that the resin vat 10 is separated from the driving device 20 to remove the resin vat 10.
- the driving device 20 further includes a vacuum pump 24, wherein the vacuum pump 24 is arranged inside the fixed seat 21, and the vacuum pump 24 is connected to the first end of the first connecting pipe 32; and the vacuum pump 24 is configured to input the gas into the container 40 through the first connecting pipe 32, or the vacuum pump is configured to extract the gas from the container 40 through the first connecting pipe 32.
- the driving device 20 further includes the vacuum pump 24 arranged inside the fixed seat 21.
- the above vacuum pump 24 has two working modes, wherein one working mode is to increase the intensity of pressure in the container 40 by inputting the gas into the container 40 through the first connecting pipe 32; and the other working mode is to reduce the intensity of pressure in the container 40 by extracting the gas from the container 40 through the first connecting pipe 32.
- a third through hole is provided on the side of the fixed seat 21 away from an outer wall of the resin vat 10
- a fourth through hole is provided on the side of the rotating component 23 away from the bottom of the resin vat 10; and the first end of the first connecting pipe 32 penetrates the third through hole, and the first end of the second connecting pipe 33 penetrates the fourth through hole.
- the third through hole is provided on the side of the fixed seat 21 away from the outer wall of the resin vat 10
- the fourth through hole is provided on the side of the rotating component 23 away from the bottom of the resin vat 10.
- the first end of the first connecting pipe 32 penetrates the third through hole to be connected to the vacuum pump 24, such that when the vacuum pump 24 works, the gas can be input into the container 40 through the first connecting pipe 32 to increase the intensity of pressure in the container 40, and the resin liquid inside the container 40 is conveyed into the resin vat 10 through the second connecting pipe 33; or, the gas is extracted from the container 40 through the first connecting pipe 32 to reduce the intensity of pressure in the container 40, such that the resin liquid inside the resin vat 10 flows back to the container 40 through the second connecting pipe 33.
- the driving device 20 further includes a liquid level detector 25, wherein the liquid level detector 25 is arranged on the side of the rotating component 23 close to the bottom of the resin vat 10; and the liquid level detector 25 is configured to detect the height of the resin liquid inside the resin vat 10.
- the liquid level detector 25 is arranged on the side of the rotating component 23 close to the bottom of the resin vat 10, and the liquid level detector 25 may detect the liquid level height of the resin liquid inside the resin vat 10, such that the driving device 20 conveys the gas into the container 40, or the driving device 20 extracts the gas from the container 40.
- the embodiment of the present invention further provides a 3D printing apparatus.
- the 3D printing apparatus includes the above feeding device, wherein the structure of the feeding device refers to the above embodiments, and the details are not repeated herein.
- the feeding device in the above embodiments is used, and therefore, the 3D printing apparatus provided in the embodiment of the present invention has the same beneficial effects as those of the feeding device in the above embodiments.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Description
- The present invention relates to the technical field of stereoscopic printing, and in particularly to feeding devices and 3D printing apparatuses.
- 3D printing apparatuses, also known as three-dimensional printing apparatuses, are machines using rapid prototyping technology, and construct three-dimensional entities in a layer-by-layer printing manner by using a forming material on the basis of digital model files. The 3D printing apparatuses have been widely applied to the fields such as industrial designs, architectures and aerospaces.
- When the existing photocuring 3D printing apparatus works, if a resin liquid inside a resin vat is insufficient, the resin liquid needs to be manually added. Then, there can be a condition in which the 3D printing apparatus runs out of the resin liquid in the printing process, but a new resin liquid is not manually supplemented. In this case a model printing failure may occur, and the resin liquid needs to be supplemented for reprinting, thus resulting in a low printing efficiency.
-
CN 208 930 724 U describes a light curing 3D printer discharging and returning device. - An objective of an embodiment of the present invention is to provide a feeding device and a 3D printing apparatus, which solves the technical problems of a model printing failure and a low printing efficiency caused by manual feeding of an existing 3D printing apparatus.
- In order to achieve the above objective, the present invention provides a feeding device as defined by the appended claims.
- One of the above technical solutions has the following advantages or beneficial effects:
- In an embodiment of the present invention, if the height of the resin liquid inside the resin vat is lower than a first preset height, the driving device inputs gas into the container through the conveying device, such that the resin liquid inside the container is conveyed into the resin vat through the conveying device, thus under conditions that a liquid level height of the resin liquid inside the resin vat is low and that the printing apparatus can be lack of the resin liquid, automatic feeding is achieved to avoid a model printing failure due to lack of the resin liquid, and thereby printing efficiency is improved without manually supplementing the resin liquid to reprint a model.
-
-
FIG. 1 is a structural diagram of a feeding device provided in an embodiment of the present invention; and -
FIG. 2 is a structural diagram of a driving device in an embodiment of the present invention. - The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the embodiments described are some rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without involving any inventive effort fall within the scope of protection of the present invention.
- As shown in
FIG. 1 , an embodiment of the present invention provides a feeding device. The feeding device includes aresin vat 10, adriving device 20 and aconveying device 30, wherein thedriving device 20 is connected to theresin vat 10, thedriving device 20 is connected to acontainer 40 filled with a resin liquid through theconveying device 30, and the interior of thecontainer 40 is further in communication with theresin vat 10 through theconveying device 30. - If the height of the resin liquid inside the
resin vat 10 is lower than a first preset height, thedriving device 20 inputs gas into thecontainer 40 through theconveying device 30, such that the resin liquid inside thecontainer 40 is conveyed into theresin vat 10 through theconveying device 30. - Optionally, in some embodiments, the
above container 40 can be a resin bottle without a bottle cap, theconveying device 30 is connected to thecontainer 40, thecontainer 40 can be provided with a closed accommodating cavity, and the accommodating cavity can be in communication with theresin vat 10 through theconveying device 30. Thus, the accommodating cavity can be connected to theresin vat 10 through theconveying device 30. - Optionally, in some embodiments, the
container 40 can be provided with a closed accommodating cavity, thecontainer 40 can also be in communication with theresin vat 10 through theconveying device 30. - The feeding device provided in the embodiment of the present invention can be applied to a 3D printing apparatus, and the
above resin vat 10 is of a vat body structure for containing the resin liquid in the 3D printing apparatus. In the process of using the 3D printing apparatus, theabove driving device 20 detects a liquid level height of the resin liquid inside theresin vat 10, and if the height of the resin liquid inside theresin vat 10 is lower than the first preset height, it is indicated that the resin liquid inside theresin vat 10 is exhausted, and the resin liquid needs to be conveyed into theresin vat 10. At the moment, thedriving device 20 inputs the gas into thecontainer 40 through theconveying device 30, thereby increasing the intensity of pressure in thecontainer 40, and the resin liquid inside thecontainer 40 is conveyed into theresin vat 10 through theconveying device 30. - It should be understood that in the embodiment of the present invention, air can be provided as the mentioned gas above in order to reduce cost. In other embodiments, other gas can also be provided as the gas, for example, in order to avoid oxidation, inert gas such as argon, etc. can be used.
- In an embodiment of the present invention, the feeding device includes the
resin vat 10, thedriving device 20 and theconveying device 30. Thedriving device 20 is connected to theresin vat 10, thedriving device 20 is connected to acontainer 40 filled with a resin liquid through theconveying device 30, and the interior of thecontainer 40 is further in communication with/connected to theresin vat 10 through theconveying device 30. Thus, under conditions that a liquid level height of the resin liquid inside theresin vat 10 is low and that the printing apparatus lacks the resin liquid, automatic feeding is achieved to avoid a model printing failure due to lack of the resin liquid, and thereby printing efficiency is improved without manually supplementing the resin liquid to reprint a model. - It should be understood that in the embodiment of the present invention, the resin liquid inside the
container 40 is conveyed into theresin vat 10, the resin liquid inside theresin vat 10 can also be further recycled, that is, the resin liquid inside theresin vat 10 is conveyed into thecontainer 40, thereby avoiding wasting of the resin liquid. For example, in the embodiment of the present invention, if the height of the resin liquid inside theresin vat 10 is higher than a second preset height, thedriving device 20 extracts the gas from thecontainer 40 through theconveying device 30, thus, the resin liquid flows back to thecontainer 40, wherein the second preset height is greater than the first preset height. - If the height of the resin liquid inside the
resin vat 10 is higher than the second preset height, it is indicated that the resin liquid inside theresin vat 10 is excessive, and the resin liquid inside theresin vat 10 needs to be recycled to thecontainer 40. Thedriving device 20 extracts the gas from thecontainer 40 through theconveying device 30 to reduce the intensity of pressure in thecontainer 40, such that the resin liquid inside theresin vat 10 flows back to thecontainer 40 through theconveying device 30, and it should be understood that, at this moment, the liquid level height of the resin liquid inside thecontainer 40 needs to meet a certain condition that thecontainer 40 needs to have a certain space to accommodate the flowing-back resin liquid. - According to the embodiment, the resin liquid is recycled through extracting the gas from the
container 40 via thedriving device 20, thereby avoiding the wasting of the resin liquid in a printing process. - The
conveying device 30 includes acontainer cover 31, a first connectingpipe 32 and a second connectingpipe 33. The first connectingpipe 32 and the second connectingpipe 33 are arranged on thecontainer cover 31; and thecontainer cover 31 is connected to thecontainer 40, the first connectingpipe 32 penetrates thecontainer cover 31, a first end of the first connectingpipe 32 is connected to thedriving device 20, a second end of the first connectingpipe 32 is arranged inside thecontainer 40, the second connectingpipe 33 penetrates thecontainer cover 31, a first end of the second connectingpipe 33 is located inside theresin vat 10, and a second end of the second connectingpipe 33 is arranged inside thecontainer 40. - The first connecting
pipe 32 and the second connectingpipe 33 can be hoses made of rubber or other materials, and when thecontainer 40 is a resin bottle, theabove container cover 31 can be a resin bottle cover, and thecontainer cover 31 is connected to thecontainer 40, thus thecontainer 40 can be provided with a closed accommodating cavity. - In this embodiment, the second end of the first connecting
pipe 32 and the second end of the second connectingpipe 33 are both arranged inside thecontainer 40. In an optional embodiment, a distance between the second end of the first connectingpipe 32 and a bottom wall of thecontainer 40 is greater than the liquid level height of the resin liquid contained in thecontainer 40, and the second end of the second connectingpipe 33 is configured to contact with the bottom wall of thecontainer 40. Thus, the first connectingpipe 32 does not contact with the resin liquid inside thecontainer 40, and the second connectingpipe 33 makes contact with the resin liquid inside thecontainer 40. - In a further optional embodiment, the distance between the second end of the first connecting
pipe 32 and the bottom wall of thecontainer 40 is less than the liquid level height of the resin liquid contained in thecontainer 40, or the distance between the second end of the first connecting pipe and the bottom wall of the container is equal to the liquid level height of the resin liquid contained in thecontainer 40, and the second end of the second connectingpipe 33 is configured to make contact with the bottom wall of thecontainer 40. Thus, the first connectingpipe 32 and the second connectingpipe 33 both make contact with the resin liquid inside thecontainer 40. - In the embodiments, the second end of the second connecting
pipe 33 is configured to make contact with the bottom wall of thecontainer 40, to guarantee that all the resin liquid contained in thecontainer 40 can be conveyed into theresin vat 10 through the second connectingpipe 33. - There can be a condition in which resin liquids of different colors need to be used in the process of printing the model. Under this condition, a plurality of
containers 40 are needed, eachcontainer 40 is filled with one color of resin liquid, theconveying device 30 can be adapted to the plurality ofcontainers 40 in the printing process, and when theconveying device 30 is adapted to eachcontainer 40, the feeding device may achieve an automatic feeding function described in this embodiment to convey the resin liquid inside eachcontainer 40 to theresin vat 10 such that the resin liquids of a plurality of colors can be conveyed into theresin vat 10. - Under this condition, the distance between the second end of the first connecting
pipe 32 and the bottom wall of thecontainer 40 is greater than the liquid level height of the resin liquid contained in thecontainer 40, such that the first connectingpipe 32 does not make contact with the resin liquid contained in thecontainer 40, and when thecontainers 40 filled with the resin liquids of different colors are adapted, only the second connectingpipe 33 needs to be cleaned such that mixing of the resin liquids of different colors can be avoided. - Another possible condition is that when printing is completed and the feeding is stopped, the
driving device 20 is controlled to extract the gas from thecontainer 40, such that the resin liquid inside theresin vat 10 flows back to thecontainer 40, or the resin liquid remaining inside the second connectingpipe 33 flows back to the container. - Optionally, a first through hole and a second through hole that penetrate the
container cover 31 are respectively provided on thecontainer cover 31, the first connectingpipe 32 penetrates the first through hole, and the second connectingpipe 33 penetrates the second through hole. - The first through hole and the second through hole that penetrate the
container cover 31 are respectively provided on thecontainer cover 31, wherein the shapes of the first through hole and the second through hole are related to those of the first connectingpipe 32 and the second connectingpipe 33, and if the first connectingpipe 32 and the second connectingpipe 33 are circular pipes, the first through hole and the second through hole are circular holes. The first through hole and the second through hole are provided on thecontainer cover 31, such that the first connectingpipe 32 and the second connectingpipe 33 penetrate thecontainer cover 31. - Optionally, the second connecting
pipe 33 includes a first connecting sub-pipe and a second connecting sub-pipe, wherein a first end of the first connecting sub-pipe is located inside theresin vat 10, the second connecting sub-pipe is located inside thecontainer 40, and a second end of the first connecting sub-pipe penetrates the second through hole to be connected to a first end of the second connecting sub-pipe; and a distance between a second end of the second connecting sub-pipe and a bottom wall of thecontainer 40 is less than a preset value. - In this embodiment, the distance between the second end of the second connecting sub-pipe and the bottom wall of the
container 40 is less than the preset value, wherein the preset value is less than the liquid level height of the resin liquid contained in thecontainer 40, to guarantee that the second connecting sub-pipe makes contact with the resin liquid inside thecontainer 40, and the resin liquid inside thecontainer 40 can be conveyed into theresin vat 10 through the second connectingpipe 33, thereby achieving feeding. - One preferred implementation is that the second end of the second connecting sub-pipe makes contact with the bottom wall of the
container 40, and under this condition, it can be guaranteed that all the resin liquid inside thecontainer 40 can be conveyed into the resin vat through theconveying device 30. - The
driving device 20 includes afixed seat 21, an elastic component 22 and arotating component 23, wherein thefixed seat 21 is connected to theresin vat 10, a first end of the elastic component 22 is connected to thefixed seat 21, and a second end of the elastic component 22 is connected to therotating component 23. - With reference to
FIG. 2, FIG. 2 is a structural diagram of the driving device in an embodiment of the present invention. As shown in this figure, thedriving device 20 includes thefixed seat 21, the elastic component 22 and therotating component 23, wherein the above elastic component 22 can be a spring. Thedriving device 20 is movably connected to theresin vat 10, and after printing is completed, the rotatingcomponent 23 can be controlled to rotatably lift through an extension spring, such that theresin vat 10 is separated from thedriving device 20 to remove theresin vat 10. - Optionally, the
driving device 20 further includes avacuum pump 24, wherein thevacuum pump 24 is arranged inside thefixed seat 21, and thevacuum pump 24 is connected to the first end of the first connectingpipe 32; and thevacuum pump 24 is configured to input the gas into thecontainer 40 through the first connectingpipe 32, or the vacuum pump is configured to extract the gas from thecontainer 40 through the first connectingpipe 32. - With further reference to
FIG. 2 , as shown in this figure, thedriving device 20 further includes thevacuum pump 24 arranged inside the fixedseat 21. Theabove vacuum pump 24 has two working modes, wherein one working mode is to increase the intensity of pressure in thecontainer 40 by inputting the gas into thecontainer 40 through the first connectingpipe 32; and the other working mode is to reduce the intensity of pressure in thecontainer 40 by extracting the gas from thecontainer 40 through the first connectingpipe 32. - Optionally, a third through hole is provided on the side of the fixed
seat 21 away from an outer wall of theresin vat 10, and a fourth through hole is provided on the side of therotating component 23 away from the bottom of theresin vat 10; and the first end of the first connectingpipe 32 penetrates the third through hole, and the first end of the second connectingpipe 33 penetrates the fourth through hole. - The third through hole is provided on the side of the fixed
seat 21 away from the outer wall of theresin vat 10, and the fourth through hole is provided on the side of therotating component 23 away from the bottom of theresin vat 10. The first end of the first connectingpipe 32 penetrates the third through hole to be connected to thevacuum pump 24, such that when thevacuum pump 24 works, the gas can be input into thecontainer 40 through the first connectingpipe 32 to increase the intensity of pressure in thecontainer 40, and the resin liquid inside thecontainer 40 is conveyed into theresin vat 10 through the second connectingpipe 33; or, the gas is extracted from thecontainer 40 through the first connectingpipe 32 to reduce the intensity of pressure in thecontainer 40, such that the resin liquid inside theresin vat 10 flows back to thecontainer 40 through the second connectingpipe 33. - Optionally, the driving
device 20 further includes aliquid level detector 25, wherein theliquid level detector 25 is arranged on the side of therotating component 23 close to the bottom of theresin vat 10; and theliquid level detector 25 is configured to detect the height of the resin liquid inside theresin vat 10. - According to
FIG. 2 , as shown in this figure, theliquid level detector 25 is arranged on the side of therotating component 23 close to the bottom of theresin vat 10, and theliquid level detector 25 may detect the liquid level height of the resin liquid inside theresin vat 10, such that the drivingdevice 20 conveys the gas into thecontainer 40, or the drivingdevice 20 extracts the gas from thecontainer 40. - The embodiment of the present invention further provides a 3D printing apparatus. The 3D printing apparatus includes the above feeding device, wherein the structure of the feeding device refers to the above embodiments, and the details are not repeated herein. In this embodiment, the feeding device in the above embodiments is used, and therefore, the 3D printing apparatus provided in the embodiment of the present invention has the same beneficial effects as those of the feeding device in the above embodiments.
- The foregoing description merely relates to the particular embodiments of the present invention, but the scope of protection of the present invention is subject to the scope of protection of the claims.
Claims (9)
- A feeding device, comprising:a resin vat (10);a driving device (20); anda conveying device (30);wherein the driving device (20) is connected to the resin vat (10), the driving device (20) is connected to a container (40) filled with a resin liquid through the conveying device (30), and the interior of the container (40) is further connected to the resin vat (10) through the conveying device (30);wherein the conveying device (30) comprises a container cover (31), a first connecting pipe (32) and a second connecting pipe (33), the first connecting pipe (32) and the second connecting pipe (33) are arranged on the container cover (31), the container cover (31) is connected to the container (40), the first connecting pipe (32) is penetrating the container cover (31), a first end of the second connecting pipe (33) is located inside the resin vat (10), and a second end of the second connecting pipe (33) is arranged inside the container (40); andwherein the driving device (20) is configured to input gas into the container (40) through the conveying device (30) when a height of the resin liquid inside the resin vat (10) is lower than a first preset height, wherein the conveying device (30) is configured to convey the resin liquid inside the container (40) into the resin vat (10),characterized in that the driving device (20) includes a fixed seat (21), an elastic component (22), and a rotating component (23), wherein the fixed seat (21) is connected to the resin vat (10), a first end of the elastic component (22) is connected to the fixed seat (21), and a second end of the elastic component (22) is connected to the rotating component (23) such that the driving device (20) is movably connected to the resin vat (10) and a rotatable lift of the rotating component (23) is controllable through the elastic component (22).
- The feeding device according to claim 1, whereinthe driving device (20) is configured to extract the gas from the container (40) through the conveying device (30) when the height of the resin liquid inside the resin vat (10) is higher than a second preset height to cause the resin liquid to flow back to the container (40); andthe second preset height is greater than the first preset height.
- The feeding device according to claim 2, whereinthe second connecting pipe (33) penetrates the container cover (31); anda first end of the second connecting pipe (33) is located inside the resin vat (10), and a second end of the second connecting pipe (33) is arranged inside the container (40).
- The feeding device according to claim 3, whereina first through hole and a second through hole that penetrate the container cover (31) are respectively provided on the container cover (31); andthe first connecting pipe (32) penetrates the first through hole, and the second connecting pipe (33) penetrates the second through hole.
- The feeding device according to claim 4, whereinthe second connecting pipe (33) comprises a first connecting sub-pipe and a second connecting sub-pipe;wherein a first end of the first connecting sub-pipe is located inside the resin vat (10), the second connecting sub-pipe is located inside the container (40), a second end of the first connecting sub-pipe penetrates the second through hole to be connected to a first end of the second connecting sub-pipe, and a distance between a second end of the second connecting sub-pipe and a bottom wall of the container (40) being less than a preset value.
- The feeding device according to claim 1, whereinthe driving device (20) further comprises a vacuum pump, the vacuum pump is arranged inside the fixed seat (21), the vacuum pump is connected to the first end of the first connecting pipe (32); andthe vacuum pump is configured to input the gas into the container (40) through the first connecting pipe (32), or the vacuum pump is configured to extract the gas from the container (40) through the first connecting pipe (32).
- The feeding device according to claim 1, whereina third through hole is provided on the side of the fixed seat (21) away from an outer wall of the resin vat (10);a fourth through hole is provided on a side of the rotating component (23) away from the bottom of the resin vat (10); andthe first end of the first connecting pipe (32) penetrates the third through hole, and the first end of the second connecting pipe (33) penetrates the fourth through hole.
- The feeding device according to claim 1, wherein the driving device (20) further comprises a liquid level detector, the liquid level detector being arranged on a side of the rotating component close to the bottom of the resin vat (10), the liquid level detector being configured to detect the height of the resin liquid inside the resin vat (10).
- A 3D printing apparatus, comprising the feeding device of any one of claims 1-8.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011429804.5A CN112721166A (en) | 2020-12-07 | 2020-12-07 | Material feeding unit and 3D printing apparatus |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4008525A1 EP4008525A1 (en) | 2022-06-08 |
EP4008525C0 EP4008525C0 (en) | 2024-04-24 |
EP4008525B1 true EP4008525B1 (en) | 2024-04-24 |
Family
ID=75598616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21205652.7A Active EP4008525B1 (en) | 2020-12-07 | 2021-10-29 | Feeding devices and 3d printing apparatuses |
Country Status (3)
Country | Link |
---|---|
US (1) | US11623403B2 (en) |
EP (1) | EP4008525B1 (en) |
CN (2) | CN118478521A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114536750A (en) * | 2022-01-26 | 2022-05-27 | 深圳市纵维立方科技有限公司 | Feeding control method, feeding control system, 3D printing system and storage medium |
CN116001277A (en) * | 2023-02-24 | 2023-04-25 | 上海雷帕罗义齿有限公司 | Intelligent processing device after resin printing |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN204955465U (en) * | 2015-09-25 | 2016-01-13 | 珠海天威飞马打印耗材有限公司 | Digit optical processing three -dimensional inkjet printer |
US20180264731A1 (en) * | 2017-03-15 | 2018-09-20 | Xjet Ltd. | System and method for delivering ink into a 3d printing apparatus |
US20180281237A1 (en) * | 2017-03-28 | 2018-10-04 | Velo3D, Inc. | Material manipulation in three-dimensional printing |
CN208930724U (en) * | 2018-10-31 | 2019-06-04 | 成都极速智造科技有限公司 | A kind of photocuring 3D printer discharging feeding back device |
AU2019377511B2 (en) * | 2018-11-09 | 2024-02-01 | NEXA3D Inc. | Three-dimensional printing system |
CN113573872A (en) * | 2019-03-18 | 2021-10-29 | 耐克森三维有限公司 | Additive manufacturing method and system |
CN211683512U (en) * | 2020-01-16 | 2020-10-16 | 福建万象三维科技有限公司 | But 3d of automatic material conveying prints and uses resin storage tank |
-
2020
- 2020-12-07 CN CN202410445282.XA patent/CN118478521A/en active Pending
- 2020-12-07 CN CN202011429804.5A patent/CN112721166A/en active Pending
-
2021
- 2021-10-29 EP EP21205652.7A patent/EP4008525B1/en active Active
- 2021-11-02 US US17/453,181 patent/US11623403B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN118478521A (en) | 2024-08-13 |
US11623403B2 (en) | 2023-04-11 |
EP4008525C0 (en) | 2024-04-24 |
EP4008525A1 (en) | 2022-06-08 |
US20220176631A1 (en) | 2022-06-09 |
CN112721166A (en) | 2021-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP4008525B1 (en) | Feeding devices and 3d printing apparatuses | |
CN203600779U (en) | Ink-jet printing head negative pressure continuous ink supplying device | |
JP2015044379A (en) | Liquid discharge device and control method of the same | |
CN110431103B (en) | Device for evacuating a container with a viscous liquid | |
KR101743007B1 (en) | Material pumping apparatus | |
CN201483892U (en) | Ink filling tool for refilling ink to ink box | |
US11511487B2 (en) | System for producing an object by means of additive manufacturing | |
CN105691970B (en) | A kind of sealing fluid reservoir of flexible inner bag compensation device | |
CN101623956A (en) | Method for refilling ink to ink box and filling tool | |
CN203247078U (en) | Pipetting device | |
CN210516859U (en) | Automatic feeding device for vacuum degassing electrolyte | |
JP2016071252A (en) | Optical fiber recoating device | |
CN107571631A (en) | A kind of automatic cleaning sprayer device | |
CN111479620B (en) | Material conveying equipment and material conveying method thereof | |
CN212010764U (en) | High-pressure impregnation equipment for capacitor | |
CN210308970U (en) | Fiber paste bubble removing device | |
CN212617648U (en) | Liquid feeding device | |
CN209158669U (en) | A kind of scrap rubber processing unit and scrap rubber recovery and processing system | |
CN108155338B (en) | Liquid pumping mechanism | |
CN206627676U (en) | One kind removes optical fiber ointment air bubble apparatus | |
CN207792666U (en) | A kind of polyurethane resin production filling apparatus | |
CN205871215U (en) | Resin storage tank and 3D printer | |
CN205554671U (en) | Semi -automatic deaeration liquid filling machine | |
CN211856157U (en) | Die casting cylinder | |
CN212864105U (en) | Discharging nozzle defoaming mechanism |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20220928 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20230306 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B33Y 10/00 20150101ALN20231123BHEP Ipc: B29C 64/124 20170101ALN20231123BHEP Ipc: B33Y 40/00 20200101ALI20231123BHEP Ipc: B33Y 30/00 20150101ALI20231123BHEP Ipc: B29C 64/321 20170101AFI20231123BHEP |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B33Y 10/00 20150101ALN20231128BHEP Ipc: B29C 64/124 20170101ALN20231128BHEP Ipc: B33Y 40/00 20200101ALI20231128BHEP Ipc: B33Y 30/00 20150101ALI20231128BHEP Ipc: B29C 64/321 20170101AFI20231128BHEP |
|
INTG | Intention to grant announced |
Effective date: 20231214 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B33Y 10/00 20150101ALN20231204BHEP Ipc: B29C 64/124 20170101ALN20231204BHEP Ipc: B33Y 40/00 20200101ALI20231204BHEP Ipc: B33Y 30/00 20150101ALI20231204BHEP Ipc: B29C 64/321 20170101AFI20231204BHEP |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602021012204 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
U01 | Request for unitary effect filed |
Effective date: 20240424 |
|
U07 | Unitary effect registered |
Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI Effective date: 20240503 |